An individual that goes on assignment would still have the home position held for them. However, they do need to do that job that he or she was doing in the home department. So, on a transfer assignment they will backfill that position. That position stays vacant and they will backfill the position with most likely a casual or a term position until that person returns to the job. So the position is vacant. The money is used to continue to do the job that the position would do back at their home department.